This is a problem when the default view has filters applied, hidden list or line items, or includes conditional formatting or sorting.
Why is this a problem?
The default view of the module should always be a blank canvas for any model builder to modify. The expectation is that nothing is hidden or modified.
How to correct:
Sorting, Filtering, and conditional formatting can be seen in the module toolbar and can be easily identified and changed. To view hidden list or line items, use Show All Rows or Show All Columns to fix this. Keep in mind, you may have hidden list or line items in your Page Selectors. Use the pivot to view to fix this if necessary.